Kant thinks this thing is transcendental and cannot be explained by the law of causality. The question belongs to the category of free will, that is to say, you can choose to believe or not, but you can't come to a scientific judgment.

personally, I think this is a kind of social unconsciousness.

1. The weak will arouse people's fear of impermanence/fate. After all, few people can firmly believe that they can be invincible forever. This is a feeling similar to that of a rabbit dying in sorrow and a thing hurting its kind.

2. when a sly rabbit dies, a running dog cooks, and birds are exhausted, but a good bow hides. If all the weaker ones are gone, you will become a stepping stone. Therefore, everyone should help the weak

3. The state is a contract concluded between the strong and the weak. The strong promises the basic rights and interests of the weak, and the weak promises to be content with the rule. In order to maintain the balance of this contract, state rulers will have a set of security system to support the weak and maintain their rule.

The instinct mentioned by the landlord is very similar to Mencius' compassion. Personally, I think it's unreliable if only this one is available. I discussed the idea of greed with my friends in high school, and they disagreed with me. Of course, these are all good factors, but they are not absolute.

Finally, the landlord can ask the worm in his stomach:)